Head cover for internal-combustion engines



G. O. BLANCHAR/D.

HEAD COVER FOR. INTERNAL COMBUSTION ENGPNE S.

APPLICATION FILED JAN. 19, 1921. VRENEWED} JULY 22. 1922.

1 4 9 011 PatentedSept. 12, 1922.

v 2 SHEET$SHEET I.

1 0 3 o o H U U U Geor ge O. Blanchard.

INVEN TOR.

A TTORNE Y.

G. 0. BLANCHARD.

HEAD COVER FOR lNTERNAL COMBUSTION ENGINES.

RENEWED JULY 22. 1922.

APPLICATION FILED JAN.I9|1921.

Patented Sept. 12,1922;

2 SHEETS-SHEET 2.

INVIL'NTOR.

$39 Geocge O. Blanchard.

A TTOR NE Y.

Patented Sept. 12, 1922.

UNITED STATES PATENT OFFICE.

HEAD COVER FOR INTERNAL-COMBUSTION ENGINES.

Application filed January 19, 1921, Serial No. 438,464. Renewed July 22, 1922. Serial No. 576,872.

- To all whom it may concern:

like parts throughout:

Be it known that I, GEORGE O. BLANOHARD, a citizen of the United States, residing at Napoleonville, in the parish of Assumption and State of Louisiana, have invented certain new and useful Improvements in Head Covers for Internal-Combustion Engines, of which the following is a specification, reference being bad to the accompanying draw-.

gearing in order toeliminate the tapping.

noises commonly present in their operation.

A further object of the invention is to provide means for collecting the oil from the oily .vapors arising from the base of 'the internal combustion engine and subsequently applying the same to the valve gearin to lubricate the valve gearing.

%)ther objects and advantages'of the invention willbecome apparent throughout the course of the following description:

In the accompanying drawings, wherein for the urpose of illustration is shown a preferred embodiment of my invention, and wherein likev reference characters designate Figure '1 is aside elevation of an internal combustion engine having my invention ap lied thereto;

igure 2 is aplan view thereof; Figure3 is a rear elevation thereof; Fi ure 4 is a section taken on the line 4-4 Fi ure 5 is a section taken on the line 5-5 of F1gure2 j I I Figure 6 s a sectionon the line 6-6 of Figure 2, and fl Figure 7 isasection on the line Figure 2. I

eferring now more particularly to the drawings, the numeral 10 indicates the cylinder of an internal combustion engine-and the numeral 11 the base thereof havingthe usual breather pipe 12, by means of which oil is supplied to the base and back pressure, caused by the leakage of the exploded gas in the cylinders past the pistons to the base, is allowed to escape.

The numeral 13 designates the usual cylinder head employed in valves having overhead gearing and the numeral 14 deslgnates the valve which normally is held against the seat by means of the spring 14 Extending upwardly from the head 13 are standards 15 in which is mounted a shaft 16 having mounted for oscillation thereon rocker arms 17 one end of which contacts the stem of the valve 14 and the other end of "which engages a lift rod 18 which is etctuated in the usual manner by the cam 19. The cam 19 serves to cause the rocker arm to oscillate about its pivot and open t valve 14 against the action of the spring 44, the lift rod being maintained against the cam by the action of the spring and the sprin returning the rocker arm 17 to the dotte line position upon each release by the cam 19. C designates a casin adapted to fit. upon the upper surface of t e head 13 to form a cover for the valve gearing to protectthe same against dust and dirt. With the for- Ward end of this casin 20 communicates, having at its free end a slip joint connection 21 adapted to coact with the opening of the breather pipe 12 so that the conduit 20 may conduct the oil vapors from the base 11 to the casing C. The casing C is provided at its opposite end portion with a plurality of openings 22 permitting the escape of the vapors.

ecured to the under surface of the top 23 of the casing C, as by means of rivets 24, or

the like, is a compressible absorbent pad 25 formed of felt or some similar material. The rivets 24 or similar attaching members which may be employed are preferably of the removable nature in order that the felt pad 24 may be replaced when it becomes C a flexible conduit.

worn in use. The conformation of the body portion 23 of the casing C is such that the rocker arms 17 engage with their ends the absorbent pad 25, for a purpose presently to appear. The pad 25 is preferably thickenedjor sags above the shaft 16 so that it contacts'the shaft as at 25.

The casing C may be secured to the head in anydesired manner. In the present instance, I have illustrated this attaching means as comprising a stud bolt 19 engaging in the head 13 of the cylinder. Means are preferably provided for furnishing oil to the felt pad 25 as for. example by an oil cup 26 extending through the metal of the to 23 and delivering its contents upon the fe t pad.

In the operation of an engine equipped with my device, the oil vapors from the engine base are conducted through a conduit 20 to the casing C and are constantly passing therethrough so that the head and valve gearing are thoroughly ventilated; These vapors coming into contact with the felt pad 25 deposit a portion of their oily contents thereon and pass out of the casing through the openings 22. The rocker arms 17 in their operation contact the felt pad 25 and, accordingly, receive therefrom a portion of the deposited oil, in turn transmitting this oil to the lift rods 18 and to the stem of the valve 14:. The shaft 16 by its'contact with the felt pad 25 at 25 likewise receives the lubricant therefrom. In event of the oil supply from thevapors arising from the base is not suiiicient to the needs of the rocker arms and their associated mechanism, additional oil may be supplied through the cups 26 and will be held in suspensionby the felt pad until released by the compression of the felt pad 25 by the ends of the rocker arms 17.

From the foregoing it will be obvious that I have constructed a cover for the heads of internal combustion engines provided with overhead valve gearing which is particularly well adapted for use by reason of the fact that it effectively prevents the collection of dust and dirt upon the valve gearing and by reason' of the fact that it provides suilicient lubrication for the valve gearing. It will likewise be obvious that the construction hereinbefore set forth is merely one s ecific embodiment of my invention which have found-particularly advantageous in use, and it will be understood that various structural changes will necessarily be resorted to in applying my invention to internal combustion engines of various types. I, accordingly, do not limit myself tothe specific structure hereinbefore set forth, except as so limited by the subjoined claims.

What I claim is:

1. In combination'with an internal combustion engine embed ing overhead valves and operating mechanism therefor embodying rocker arms mounted upon the head of the engine, a casing secured to the engine head and enclosing the valve gearing carried thereby, a conduit connecting said casing with the interior of the engine base and means within the casing for collecting oil from the vapors from the base and depositing the same upon said rocker arms.

2. In combination with an internal co1nbustion engine embodying a head and valve operating mechanism carried by said head and embodying oscillatory rocker arms. a casing secured to said head and enclosing said valve operating mechanism, an absorbent pad carried by said casing and against which the ends of said rocker arms engage and means for delivering lubricant to said absorbent pad, comprising a conduit connecting said casing with the interior of the engine base.

3.ln combination with an internal combustion engine embodying overhead valves, an operating mechanism therefor embodying rocker arms mounted upon the head of the engine, a casing secured to the head of the engine enclosing the valve operating mechanism carried thereby, a conduit connecting said casing with the interior of the engine base, means within the casing for collecting oil from the vapors from the base and depositing the same upon said rocker arms mbodying an absorbent member disposed within said casing and a ,ainst which said rocker arms engage an additional means for delivering oil to said absorbent member.

4. In combination with an internal com bustion engine embodying overhead valves, an operating mechanism thereforembodying a rock shaft mounted upon the head of the engine, rocker arms carried by the rock shaft, a casing secured to the head of the engine and enclosin the valve operating mechanism carried t ereby, a conduit con.- necting said casing withthe interior of the engine base for conducting vapors from the base of the engine to said casing, means within the casing for collecting oil from the vapors from the base and depositing the same upon said-shaft and rocker arms embodying an absorbent member disposed within "the casing and embodying portions against which said shaft and rocker arms engage.

GEO. o. BLANCHARD- 

